Cover plate for an electrical outlet box support



FIG. 1 is a top perspective showing of the ornamental design for a cover plate for an electrical outlet box support of the present invention;

FIG. 2 is a front elevational showing of the ornamental design for the cover plate for an electrical outlet box support of FIG. 1.

FIG. 3 is a side perspective showing of the ornamental design for the cover plate for an electrical outlet box support of FIG. 1.

FIG. 4 is a rear elevational showing of the ornamental design for the cover plate for an electrical outlet box support of FIG. 1.

FIG. 5 is a top elevational showing of the ornamental design for the cover plate for an electrical outlet box support of FIG. 1; and,

FIG. 6 is a bottom elevational showing of the ornamental design for the cover plate for an electrical outlet box support of FIG. 1. 

The ornamental design for a cover plate for an electrical outlet box support, substantially as shown and described. 